//[section1]: Definition of global variables
var mmlparse='<?xml version="1.0" encoding="UTF-8" standalone="no"?><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"  xmlns:mml="http://www.w3.org/1998/Math/MathML"><body>';
var newmath='<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mstyle tempstyle="1" mathsize="20pt"><mml:mstyle mathbackground="#00ff00" tempinput="1"><mml:ci id="1">&#x25A1;</mml:ci></mml:mstyle></mml:mstyle></mml:math>';
var currentmath=newmath;
var mmlparse1='</body></html>';
var focuson;
var editMode=1; //1:design mode; 2:content mode;3:presentation mode; 4:infix mode;  5:preview mode 
var histmath = new Array();
var histp=0;
var histr=0;
var copymath;
var f34key;
var sMathml0;
var sMathml;
var currentmathP;
var currentmath1;
var designWin;
var designDoc;
var designFra;
var mmlns  = "http://www.w3.org/1998/Math/MathML";
var mml="mml:";
var idnum=1;
var xslRef;
 
//designDoc.onclick=domouseclick;

//[section2]: 
function start()
{
 if (getOs()==1)
 {
 	 mmlparse=mmlparse+'<object id="matheditdemo1" classid="clsid:32F66A20-7614-11D4-BD11-00104BD3F987" codebase="http://www.dessci.com/dl/mathplayer.cab"></object><import namespace="mml" implementation="#matheditdemo1">';
   designWin=design_frame;
   designDoc=designWin.document; 
 }
 else
 {
 	 var myXMLHTTPRequest = new XMLHttpRequest();
   myXMLHTTPRequest.open("GET", "../mathedit/style/mathml.xsl", false);
   myXMLHTTPRequest.send(null);
   xslRef = myXMLHTTPRequest.responseXML;
   designFra=document.getElementById("design_frame");
   designWin=designFra.contentWindow;
   designDoc=designWin.document;
   solvematrixdisplay(designDoc);
 }
	if ( parent.opener != null )
	{
	 try{
  	 if(parent.opener.mathedit.op=="edit")
  	 {
  	  currentmath = parent.opener.mathedit.getCurrentMath();
      currentmath = addFocus();
     }
     else if(parent.opener.mathedit.op=="display_edit")
  	 { 
  	  if(parent.opener.mathedit.codeType=='1')
  	    currentmath = parent.opener.mathedit.getCurrentMath2();
  	  else if(parent.opener.mathedit.codeType=='2')
  	    currentmath = addprefix(parent.opener.mathedit.getCurrentMath2());  
      currentmath = addFocus();
      }
   }catch(e){}
	} 
	renew();
	if(getOs()==1)
	{
	  designDoc.attachEvent("onkeydown", doKey);
	}else
	{
		 designDoc.addEventListener("keydown", doKey, false);
		 designDoc.addEventListener("click", domouseclick, false);
	}
  histmath[0]=currentmath;
}
function solvematrixdisplay(target1) // //The function is to solve the problem of matrix display 
{
	 var mmlns="http://www.w3.org/1998/Math/MathML";
   var d= designDoc.createDocumentFragment();
   var m = designDoc.createElementNS(mmlns,"math");
   m.setAttribute("xmlns",mmlns);
   var box = designDoc.createElementNS(mmlns,"mi");
   box.appendChild(designDoc.createTextNode("\u25A1"));
   m.appendChild(box);
   d.appendChild(m);
   target1.body.appendChild(d); 
}
function doNew()
{
	currentmath=newmath;
	renew();
  savehist();
}
function renew()
{
	designDoc.body.innerHTML="";
	if(getOs()==1)
	{
		 designDoc.write(mmlparse+currentmath+mmlparse1);
	}
	else
	{
		//setTimeout("timeout1();",5); //mouse click problem
		timeout1();
	}
	var af=new Array();
  af=findfocus();
  var selectedMath;
  if(getOs()==1)
  {
   selectedMath=af[0].firstChild.xml;
   window.status=selectedMath.replace(/xmlns:mml="http:\/\/www.w3.org\/1998\/Math\/MathML"/i,"");
  }
  else
  {
   var ds=document.getElementById("selectedMath");
   ds.innerHTML="";
   var dsc=af[0].firstChild.cloneNode(true);
   ds.appendChild(dsc);
   selectedMath=ds.innerHTML;
   window.status=selectedMath;
  }
  disInfix();
  selectedInfix();
}
function timeout1()
{
  	var mp=mctomp(currentmath);
		designDoc.body.appendChild(mp);
}

function mctompStr(mc)
{
	if(getOs()==1)
 {
 		 var oXslDom = new XslDom();
    oXslDom.async=false;
    oXslDom.load("../mathedit/style/mathml.xsl");
    var oXslTemplate=new XSLTemplate();
    oXslTemplate.stylesheet = oXslDom;
    var oXslProcessor=oXslTemplate.createProcessor();
    var aVersions = [ "MSXML2.DOMDocument.4.0","MSXML2.DOMDocument.5.0","MSXML2.DOMDocument.3.0",
       "MSXML2.DOMDocument","Microsoft.XmlDom"];
    for (var i = 0; i < aVersions.length; i++) 
    {
       try {
             var xmlDoc3 = new ActiveXObject(aVersions[i]);
	           xmlDoc3.async=false;
	           xmlDoc3.loadXML(mc.toString());
         } catch (oError) {
        }
    }
    oXslProcessor.input=xmlDoc3;
    oXslProcessor.transform();
    return oXslProcessor.output.toString();
 }else
 {
 	 var mpDom=mctomp(mc);
 	 var xmls = new XMLSerializer(); 
 	 var xmlStr=xmls.serializeToString(mpDom,"text/xml"); 
 	 xmlStr=xmlStr.replace(/<a0:/gi,"<mml:");
 	 xmlStr=xmlStr.replace(/<\/a0:/gi,"</mml:");
 	 xmlStr=xmlStr.replace(/xmlns:a0\=/gi,"xmlns:mml\=");
 	 return xmlStr;
 }
}

function mctomp(mc)
{	
	var xsltProcessor = new XSLTProcessor();
  xsltProcessor.importStylesheet(xslRef);
  var parser = new DOMParser();  
  var myDocument = parser.parseFromString(mc.toString(),"text/xml");
  var fragment = xsltProcessor.transformToFragment(myDocument, document);  
  return fragment;
}

function doOpen()
{
	var file1=window.showModalDialog("open.html","openfile","dialogWidth=540px;dialogHeight=540px");
  var msta=file1.match("<mml:math").index;
  var mend=file1.match("</mml:math>").index;
  currentmath=file1.substring(msta,mend+11);
  currentmath=addFocus();
  renew();
  savehist();
}
function doSave()   
{   
 try{
   var filename1=prompt("Please enter the file name and it's path(For example: d:\\filepath\\new.mml )","d:\\filepath\\new.mml");
   if(filename1==null) return;
   var fso = new ActiveXObject("Scripting.FileSystemObject");
   var a = fso.CreateTextFile(filename1, true);
   cm1=getCode();
   a.WriteLine(cm1);
   a.Close();
   alert("Successfully Saved");
 }catch(e){
	alert(e.description);
 }
}
function doReturn()
{
	if(parent.opener==null)
	{
		alert("When MathEdit was not openned by newMath() methode,The return button can not be used");
	  return;
	}
	cm1=new Array();
  cm1=getCode();
	
	parent.opener.mathedit.getMath(cm1);
     //  }catch(e){
 // alert("jiushi "+e.message+e.lineNumber);
        //        }
}
function findfocus()
{ 
  var xmlDoc=createMSXML();
  var root=xmlDoc.documentElement;
  var mstyles=getElementsByTagName1(xmlDoc,"mstyle");
  num_mstyles=mstyles.length;
  for (i = 0; i < num_mstyles; i++) 
  { 
    mstyle= mstyles.item(i); 
    mstyleAttr = mstyle.getAttribute("tempinput"); 
    if(mstyleAttr=="1" || mstyleAttr=="2")
    {
  	   focuson=mstyle;
  	 }
  }
  var ra=new Array();
  ra[0]=focuson; ra[1]=root;ra[2]=xmlDoc;
  return ra;

}
function doCopy()
{
  var af=new Array();
  af=findfocus();
  copymath=af[0];
}
function doCut()
{
	var af=new Array();
  af=findfocus();
  copymath=af[0];
	doDelete();
}
function doPaste()
{
	if(editMode==2||editMode==3||editMode==4)
  {   
     alert("This function can not be used in MathML Content or Infix Mode");
     return;
  }
	if(copymath==null)
	{
		return;
	}
	var af=new Array();
  af=findfocus();
  focuson=af[0];
 	copymath1=addIdAttribute(copymath,1);
  focuson.parentNode.replaceChild(copymath1,focuson);
	currentmath=getxml(af[1]);
	renew();
  savehist();
}

function doStyle(kd,sty)
{
	if(editMode==2 || editMode==3 || editMode==4)
  {
     alert("This function can not be used in Code Mode");
     return;
  }
	var xmlDoc=createMSXML();
  var root=xmlDoc.documentElement;
  var mstyles=getElementsByTagName1(xmlDoc,"mstyle");
  num_mstyles=mstyles.length;
  for (i = 0; i < num_mstyles; i++) 
  { 
    mstyle= mstyles.item(i); 
    mstyleAttr = mstyle.getAttribute("tempstyle"); 
    if(mstyleAttr=="1")
    {
  	fon=mstyle;
  	}
  }
  if(kd=="va") //mathvariant
  {
  	   exsty = fon.getAttribute("mathvariant");
  	   if(exsty==sty)
  	   {
  	   	fon.removeAttribute("mathvariant");
  	   }else if(exsty=="bold" && sty=="italic")
  	   {
  	     fon.setAttribute("mathvariant","bold-italic");
  	   }
  	   else if(exsty=="italic" && sty=="bold")
  	   {
  	     fon.setAttribute("mathvariant","bold-italic");
  	   }else
  	   {
  	   	 fon.setAttribute("mathvariant",sty);
  	   }
  }
  if(kd=="si")//mathsize
  {
  	if(sty=="Size")return;
    if(sty=="-1")
    {
    		ifs=prompt("Please Input Font Size (only the numeric):",20)
    		if(ifs==null)return;
    		sty=parseInt(ifs);
  	    if(isNaN(sty))
  	    {
  	      alert("please only input the numeric, not include the pt,%,etc.");
    	    return;
    	  }
    	}
   	fon.setAttribute("mathsize",sty+"pt");
   }
   if(kd=="co") //mathcolor and mathbackground
   {
   	   if(sty=="f")
   		 var colorwin=window.open("color.html","Set_ForeColor","toolbar=no,menubar=no,personalbar=no,width=250,height=190,scrollbars=no,resizable=no");
       if(sty=="b")
       var colorwin=window.open("color.html","Set_BackgroundColor","toolbar=no,menubar=no,personalbar=no,width=250,height=190,scrollbars=no,resizable=no");
       colorwin.focus();
    	 return;
   }
   if(kd=="fa") //fontfamily
   {
   	fon.setAttribute("fontfamily",sty);
   }	  
  currentmath=getxml(root);
  renew();
  savehist();
}
function setColor(colorvalue,obj)
{
   if(editMode==2 || editMode==3 || editMode==4)
  {
     alert("This function can not be used in Code Mode");
     return;
  }
	var xmlDoc=createMSXML();
  var root=xmlDoc.documentElement;
  var mstyles=getElementsByTagName1(xmlDoc,"mstyle");
  num_mstyles=mstyles.length;
  for (i = 0; i < num_mstyles; i++) 
  { 
    mstyle= mstyles.item(i); 
    mstyleAttr = mstyle.getAttribute("tempstyle"); 
    if(mstyleAttr=="1")
    {
  	fon=mstyle;
  	}
  }
  if(obj=="Set_ForeColor")
  {
  	 fon.setAttribute("mathcolor",colorvalue);
  }
  if(obj=="Set_BackgroundColor")
  {	
  	fon.setAttribute("mathbackground",colorvalue);
  }
  currentmath=getxml(root);
  renew();
  savehist();
}

function selectedMathml()
{ 
    var dlg1=window.open("selectedMathml.html","Selected_MathML_Content_Code","toolbar=no,menubar=no,personalbar=no,width=550,height=250,scrollbars=no,resizable=yes");	
}
function setSelectedMathml(openWin)
{
	var af=new Array();	
  af=findfocus();
  var selectedMath1=getxml(af[0].firstChild);
  if(getOs()==1)
  {
    selectedMath1=selectedMath1.replace(/xmlns:mml="http:\/\/www.w3.org\/1998\/Math\/MathML"/i,"");
  }
	if(openWin!=null)
	{
		openWin.document.f6.mathcode.value=selectedMath1;
		return;
  }
}
function returnSelectedMathml(Str)
{
  var af=new Array();	
  af=findfocus();
  Str='<mml:mstyle mathbackground="#00ff00" tempinput="1" xmlns:mml="http://www.w3.org/1998/Math/MathML">'+Str+'</mml:mstyle>';
  var xmlDoc1=createMSXML(Str);
  var root1=xmlDoc1.documentElement;
  addIdAttribute(root1,0);
  af[0].parentNode.replaceChild(root1,af[0]);
  currentmath=getxml(af[1]);
  renew();
  savehist();
}
 
//zyj
function infixfocus()
{  
	 editMode=6;
}
function infixblur()
{
	 editMode=1;
}
function selectedInfix()
{
 cm1=new Array();
 cm1=getCode();
 currentmath1=cm1[0];
 var af=new Array();
 af=findfocus();
 currentmath1=getxml(af[1]);
 var selectedMath1=getxml(af[0].firstChild);
 sMathml=selectedMath1.replace(/xmlns:mml="http:\/\/www.w3.org\/1998\/Math\/MathML"/i,"");
 var selectedMathml='<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">'+sMathml.substr(0,sMathml.length)+'</mml:math>'; 
 var outmathml=strConvert(selectedMathml);
 var infixinputbox1=document.getElementById('sinfixinputbox');
 if(infixinputbox1!=null) infixinputbox1.value=outmathml;
}
function disInfix()
{
 cm1=new Array();
 cm1=getCode();
 currentmath1=cm1[0];
 var outmathml=strConvert(currentmath1);
 var infixinputbox1=document.getElementById('infixinputbox');
 if(infixinputbox1!=null) infixinputbox1.value=outmathml;
}
function disInfixChange()
{
    var infixinputbox1=document.getElementById('infixinputbox');
    var iv=infixinputbox1.value;
    var c=currentmath;
  	currentmath=addprefix(iv);
    if(getOs()>=2)
    {
     designDoc.body.innerHTML="";
     solvematrixdisplay(designDoc);
     //designDoc.addEventListener("keydown", doKey, false);
    // designDoc.addEventListener("click", domouseclick, false);
    }
    renew();
    var c1=c.replace(/id="."/gi,"");
    var c2=currentmath.replace(/id="."/gi,"");
    if(c1!=c2)
    {
   	 savehist();
    }
}
function selectedInfixChange(){
 var infixinputbox1=document.getElementById('sinfixinputbox');
 var iv=infixinputbox1.value;
 var result=convertToContentDOM(iv);
 result=addIdAttribute(result,0);
 var af=new Array();
 af=findfocus();
 var focuson=af[0];
 var xmlDoc=createMSXML();
 var s=createElement1(xmlDoc,"mstyle");
  s.setAttribute("mathbackground","#00ff00");
  s.setAttribute("tempinput","1");
  var result1=result.cloneNode(true);
  s.appendChild(result1);
 focuson.parentNode.replaceChild(s,focuson);
 currentmath=getxml(af[1]);
 currentmath=addfn(currentmath);
 renew();
 savehist();
}

function addIdAttribute(node1,change)
{
	var ciNodes=getElementsByTagName1(node1,"ci");
	var cnNodes=getElementsByTagName1(node1,"cn");
	for(var i=0;i<ciNodes.length;i++)
	{
		
		if(ciNodes[i].id!=null && change==0)
		{
	  }
		else
	  {
	  	ciNodes[i].setAttribute("id",++idnum);
	  }	
	}
	for(var i=0;i<cnNodes.length;i++)
	{
		if(cnNodes[i].id!=null && change==0)
		{
	  }
		else
	  {
	  	cnNodes[i].setAttribute("id",++idnum);
	  }	
	}
	return node1;
}

function insertChar(ic,kd)
{
	 var xmlDoc=createMSXML();
	 var root=xmlDoc.documentElement;
	 var mstyles=getElementsByTagName1(xmlDoc,"mstyle");
	 num_mstyles=mstyles.length;
	 for (i = 0; i < num_mstyles; i++) 
   { 
     mstyle= mstyles.item(i); 
     mstyleAttr = mstyle.getAttribute("tempinput"); 
     if(mstyleAttr=="1" || mstyleAttr=="2")
     {
     	focuson=mstyle;
     }
   }
  focuschild=focuson.firstChild;
  var focusparent=focuson.parentNode;
  var oldchar;
  oldchar=getxml(focuschild.firstChild);
  var s=createElement1(xmlDoc,"mstyle");
  s.setAttribute("mathbackground","#00ff00");
  s.setAttribute("tempinput","1");
  if(focuschild.tagName=="mml:ci" ||focuschild.tagName=="ci")
  {
  	if(oldchar.charCodeAt(0)!=9633)
  	{
  	  ic=oldchar+ic;
  	  kd=1;
    }
  }else if(focuschild.tagName=="mml:cn" ||focuschild.tagName=="cn")
  {
  	if(kd==1)
    {
  	  kd=3;
    }else if(oldchar.charCodeAt(0)!=9633)
  	{
  	  ic=oldchar+ic;
    }
  }
  if(kd==1)
  {
    var box0 = createElement1(xmlDoc,"ci");
    box0.appendChild(xmlDoc.createTextNode(ic));
    box0.setAttribute("id",++idnum);
    s.appendChild(box0);
    focusparent.replaceChild(s,focuson);
  }
  if(kd==2)
  {
  	var box0 = createElement1(xmlDoc,"cn");
  	box0.appendChild(xmlDoc.createTextNode(ic));
  	box0.setAttribute("id",++idnum);
    s.appendChild(box0);
    focusparent.replaceChild(s,focuson);
  }
  if(kd==3)
  {
  	var ap0 =createElement1(xmlDoc,"apply");
  	var times = createElement1(xmlDoc,"times");
    var box0 = createElement1(xmlDoc,"ci");
    box0.appendChild(xmlDoc.createTextNode(ic));
    box0.setAttribute("id",++idnum);
  	s.appendChild(box0);
  	ap0.appendChild(times);
  	ap0.appendChild(focuschild);
  	ap0.appendChild(s);
  	focusparent.replaceChild(ap0,focuson);
  }
  currentmath=getxml(root);
  renew();
  savehist();
}

function insertElement(de,cp)
{
   var xmlDoc=createMSXML();
	 var root=xmlDoc.documentElement;
	 var mstyles=getElementsByTagName1(xmlDoc,"mstyle");
	 num_mstyles=mstyles.length;
	 for (i = 0; i < num_mstyles; i++) 
   { 
   mstyle= mstyles.item(i); 
   mstyleAttr = mstyle.getAttribute("tempinput"); 
   if(mstyleAttr=="1" || mstyleAttr=="2")
   {
   	focuson=mstyle;
   	}
   }
  var ap0 = createElement1(xmlDoc,"apply");
  var cde = createElement1(xmlDoc,de);
  var s=createElement1(xmlDoc,"mstyle");
  s.setAttribute("mathbackground","#00ff00");
  s.setAttribute("tempinput","1");
  var box0 = createElement1(xmlDoc,"ci");
  box0.appendChild(xmlDoc.createTextNode("\u25A1"));
  var box1 = createElement1(xmlDoc,"ci");
  box1.appendChild(xmlDoc.createTextNode("\u25A1"));
  var box2 = createElement1(xmlDoc,"ci");
  box2.appendChild(xmlDoc.createTextNode("\u25A1"));
  ap0.appendChild(cde);
  var bvar1=createElement1(xmlDoc,"bvar");
  var ciBvar=createElement1(xmlDoc,"ci");
  ciBvar.setAttribute("type","bvar");
  bvar1.appendChild(ciBvar);
  lowlimit1=createElement1(xmlDoc,"lowlimit");
  uplimit1=createElement1(xmlDoc,"uplimit");
  var ap1 = createElement1(xmlDoc,"apply");
  
  if(cp==1)
  { 	
  	 s.appendChild(focuson.firstChild);
  	 ap0.appendChild(s);	 
  }
  if(cp==2)
  {
  	box0.setAttribute("id",++idnum);
  	if(de=="power" || de=="divide")
    {  s.appendChild(focuson.firstChild);
       ap0.appendChild(s);
       ap0.appendChild(box0);
    }
    else
    {
      ap0.appendChild(focuson.firstChild);
      s.appendChild(box0);
      ap0.appendChild(s);
    } 
  }
  if(cp==6)
  { 	
  	 s.appendChild(focuson.firstChild);
  	 var ap3 = createElement1(xmlDoc,"fn");
  	 var ap4 = createElement1(xmlDoc,"apply");
  	 ap3.appendChild(cde);	
  	 ap4.appendChild(ap3);	
  	 ap4.appendChild(s); 
  }
  if(cp==7) //forall,exists
  {
  	box0.setAttribute("id",++idnum);
  	box1.setAttribute("id",++idnum);
  	ciBvar.appendChild(box1);
  	ap0.appendChild(bvar1);
  	s.appendChild(box0);
    ap0.appendChild(s);
  }
  if(cp==8)      //root
  {
  	var degree= createElement1(xmlDoc,"degree");
  	box0.setAttribute("id",++idnum);
    degree.appendChild(box0);
    s.appendChild(focuson.firstChild);
    ap0.appendChild(degree);
    ap0.appendChild(s);
  }
  if(cp==9)  //log
  {
  	var logbase= createElement1(xmlDoc,"logbase");
  	box0.setAttribute("id",++idnum);
  	logbase.appendChild(box0);
  	s.appendChild(focuson.firstChild);
  	ap0.appendChild(logbase);
  	ap0.appendChild(s);
  }
  if(cp==10)  //sum(2),product(2)
  {
  	domain0=createElement1(xmlDoc,"domainofapplication");
  	s.appendChild(box0);
  	domain0.appendChild(s);
  	ap0.appendChild(domain0);
  	box0.setAttribute("id",++idnum);
  	ap0.appendChild(focuson.firstChild);
  	
  }
  if(cp==11)   // int(2) 
  { 
    lowlimit1.appendChild(s);
  	s.appendChild(focuson.firstChild);
  	ap1=createElement1(xmlDoc,"apply");
  	ap1=createElement1(xmlDoc,"apply");
  	var cde1 = createElement1(xmlDoc,de);
  	box0.setAttribute("id",++idnum);
  	ciBvar.appendChild(box0);
  	ap1.appendChild(cde1);
    ap1.appendChild(bvar1);
    ap1.appendChild(lowlimit1);
    box1.setAttribute("id",++idnum);
  	ap1.appendChild(box1);
  	ap0.appendChild(ap1);
  }
  if(cp==12)   // sum(3); product(2); int; limit
  {
  	s.appendChild(focuson.firstChild);
  	lowlimit1.appendChild(s);
  	box0.setAttribute("id",++idnum);
  	uplimit1.appendChild(box0); 	
  	if(de=="int" || de=="limit")
  	{ 
  		ciBvar.appendChild(s);
  		ap0.appendChild(bvar1);
  		box1.setAttribute("id",++idnum);
  		lowlimit1.appendChild(box1);
    }
    ap0.appendChild(lowlimit1);
    if(de!="limit")
    { lowlimit1.appendChild(s);
    	box1.setAttribute("id",++idnum);
    	ciBvar.appendChild(box1);
    	ap0.appendChild(uplimit1);
    }
    box2.setAttribute("id",++idnum);
  	ap0.appendChild(box2);
  }
  if(cp==13 || cp==14 )
  {
  	if(cp==13)
  	{
  		rs1=3;cs1=3;
  	}
  	if(cp==14)
  	{
  	  var rs=prompt("Please Input the Number of Rows:","5");
  	  var cs=prompt("Please Input the Number of Columns:","4");
  	  if(rs==null || cs==null)return;
  	  rs1=parseInt(rs);
  	  cs1=parseInt(cs);
  	  if(isNaN(rs1))
  	  {
  	  	alert("Your input row is not a number.");return;
  	  }  
  	}

  	if(isNaN(cs1))
    {
	  	alert("Your input column is not a number.");return;
    }
  	matrow=new Array();
  	matcol=new Array();
  	for(var j=0;j<cs1*rs1;j++)
  	{
  		matcol[j]=createElement1(xmlDoc,"ci");
  		matcol[j].setAttribute("id",++idnum);
  		matcol[j].appendChild(xmlDoc.createTextNode("\u25A1"));
  	}
  	for(var i=0;i<rs1;i++)
  	{
  		matrow[i]=createElement1(xmlDoc,"matrixrow");
  		matcol[i]=new Array();
  		for(j=0;j<cs1;j++)
  	  {
  		  matcol[i][j]=createElement1(xmlDoc,"ci");
  		   matcol[i][j].setAttribute("id",++idnum);
  		  matcol[i][j].appendChild(xmlDoc.createTextNode("\u25A1"));
  		  if(i==0 && j==0)
  		  {
  		  	s.appendChild(matcol[i][j]);
  		  	matrow[i].appendChild(s);
  		  }else
  		  {
  		    matrow[i].appendChild(matcol[i][j]);
  		  }
  	  }
  		cde.appendChild(matrow[i]);
  	}
  	
  }
  if(cp==15)
  {
  		var cs=prompt("Please Input the Number of Columns:","4");
  		if(cs==null)return;
  		cs1=parseInt(cs);
  		if(isNaN(cs1))
      {
	  	  alert("Your input column is not a number.");return;
      }
      var verc=new Array();
  		for(i=0;i<cs1;i++)
  	  {
  		  verc[i]=createElement1(xmlDoc,"ci");
  		  verc[i].setAttribute("id",++idnum);
  		  verc[i].appendChild(xmlDoc.createTextNode("\u25A1"));
  	    if(i==0)
  		  {
  		  	s.appendChild(verc[i]);
  		  	cde.appendChild(s);
  		  }
  		  else
     		   cde.appendChild(verc[i]);
  		  
  	  }
  	  
  	}
  if(cp>=16 && cp<=19)
  {
  	box0.setAttribute("id",++idnum);
  	s.appendChild(box0);
  	switch(cp)
  	{
  		case 16:
  		  cde.setAttribute("closure","closed"); break;
  		case 17:
  		  cde.setAttribute("closure","open-closed"); break;
  		case 18:
  		  cde.setAttribute("closure","closed-open"); break;
  		case 19:
  		  cde.setAttribute("closure","open"); break;
  	}
  	cde.appendChild(focuson.firstChild);
  	cde.appendChild(s);
  }
  if(cp==20) //*
  {
  	  var tn=focuson.parentNode.firstChild.tagName;
  	  var su=0;
  	  if(tn.search(de)!=-1)
  	  {
  	  	box0.setAttribute("id",++idnum);
        s.appendChild(box0);
        su=1;
  	  }else
  	  {
   	   ap0.appendChild(focuson.firstChild);
   	   box0.setAttribute("id",++idnum);
       s.appendChild(box0);
       ap0.appendChild(s);
      }
  }
  if(cp==21) //-
  {
  	  var focusparent=focuson.parentNode;
  	  var fp=focusparent;
  	  var tn=focusparent.firstChild.tagName;
  	  var su=0;
  	  if(tn.search("plus")!=-1 || tn.search("minus")!=-1)
  	  {	
  	  	focusparent.replaceChild(focuson.firstChild,focuson);
  	  	var sem = createElement1(xmlDoc,"semantics");
  	  	var fpc=focusparent.cloneNode(true);
  	  	sem.appendChild(fpc);
  	  	ap0.appendChild(sem);
   	    box0.setAttribute("id",++idnum);
        s.appendChild(box0);
        ap0.appendChild(s);
        su=1;
  	  }else if(tn.search("times")!=-1)
  	  {
  	  	var fptg=focusparent.parentNode.firstChild.tagName;
  	  	if(fptg.search("plus")!=-1 || fptg.search("minus")!=-1)
   	    {
   	    	focusparent.replaceChild(focuson.firstChild,focuson);
   	    	var sem = createElement1(xmlDoc,"semantics");
   	    	var fppc=focusparent.parentNode.cloneNode(true);
  	  	  sem.appendChild(fppc);
  	  	  ap0.appendChild(sem);
   	      box0.setAttribute("id",++idnum);
          s.appendChild(box0);
          ap0.appendChild(s);
          su=2;
   	    }else
   	    {
   	    	focusparent.replaceChild(focuson.firstChild,focuson);
   	    	var fpc=focusparent.cloneNode(true);
  	  	  ap0.appendChild(fpc);
   	      box0.setAttribute("id",++idnum);
          s.appendChild(box0);
          ap0.appendChild(s);
          su=1;
   	    }
      }else
      {
  	  	  ap0.appendChild(focuson.firstChild);
   	      box0.setAttribute("id",++idnum);
          s.appendChild(box0);
          ap0.appendChild(s);
          su=3;
      }  
  }
  if(cp==22) //+
  {
  	  var fp=focuson.parentNode;
  	  var tn=fp.firstChild.tagName;
  	  var su=0;
  	  if(tn.search("plus")!=-1)
  	  {
  	  	box0.setAttribute("id",++idnum);
        s.appendChild(box0);
        su=1;
  	  }else if(tn.search("times")!=-1)
  	  {
  	  	var fptg=fp.parentNode.firstChild.tagName;
  	  	if(fptg.search("plus")!=-1)
   	    {
   	    	box0.setAttribute("id",++idnum);
          s.appendChild(box0);
          su=2;
   	    }else if(fptg.search("minus")!=-1)
   	    {
   	    	fp.replaceChild(focuson.firstChild,focuson);
  	  	  var sem = createElement1(xmlDoc,"semantics");
  	  	  var fppc=fp.parentNode.cloneNode(true);
  	  	  sem.appendChild(fppc);
  	  	  ap0.appendChild(sem);
   	      box0.setAttribute("id",++idnum);
          s.appendChild(box0);
          ap0.appendChild(s);
          su=3;
   	    }else
   	    {
   	    	fp.replaceChild(focuson.firstChild,focuson);
   	    	var fpc=fp.cloneNode(true);
  	  	  ap0.appendChild(fpc);
   	      box0.setAttribute("id",++idnum);
          s.appendChild(box0);
          ap0.appendChild(s);
          su=4;
   	    }
      }else if(tn.search("minus")!=-1)
      {
  	  	fp.replaceChild(focuson.firstChild,focuson);
  	  	var sem = createElement1(xmlDoc,"semantics");
  	  	var fpc=fp.cloneNode(true);
  	  	sem.appendChild(fpc);
  	  	ap0.appendChild(sem);
   	    box0.setAttribute("id",++idnum);
        s.appendChild(box0);
        ap0.appendChild(s);
        su=4;
      }else
      {
      	 ap0.appendChild(focuson.firstChild);
   	     box0.setAttribute("id",++idnum);
         s.appendChild(box0);
         ap0.appendChild(s);
      }  
  }
  var focusparent=focuson.parentNode;
  if(cp>=13 && cp<=19)
  {
    focusparent.replaceChild(cde,focuson);
  }else if(cp==20)
  {
  	if(su==1)
  	{
  		focusparent.replaceChild(focuson.firstChild,focuson);
  		focusparent.appendChild(s);
  	}else
    {
    	focusparent.replaceChild(ap0,focuson);
    }
  }else if(cp==21)
  {
  	if(su==1)
  	{
  		fp.parentNode.replaceChild(ap0,fp);
  	}else if(su==2)
  	{
  		var fpp=fp.parentNode;
  		fpp.parentNode.replaceChild(ap0,fpp);
  	}else if(su==3)
  	{
  		focusparent.replaceChild(ap0,focuson);
  	}
  }else if(cp==22)
  {
  	if(su==1)
  	{
  		focusparent.replaceChild(focuson.firstChild,focuson);
  		focusparent.appendChild(s);
  	}else if(su==2)
  	{
  		focusparent.replaceChild(focuson.firstChild,focuson);
  		focusparent.parentNode.appendChild(s);
  	}else if(su==3)
  	{
  		fp.parentNode.parentNode.replaceChild(ap0,fp.parentNode);
  	}else if(su==4)
  	{
  		fp.parentNode.replaceChild(ap0,fp);
  	}else if(su==5)
  	{
  		fp.parentNode.replaceChild(ap0,fp);
  	}else if(su==0)
  	{
  		focusparent.replaceChild(ap0,focuson);
  	}
  }else if(cp==6)
  {
  	focusparent.replaceChild(ap4,focuson);
  }else
  {
  	focusparent.replaceChild(ap0,focuson);
 	}
  currentmath=getxml(root);
  renew();
  savehist();
}

function doEnter()
{
	var af=new Array();
  af=findfocus();
  var focuson=af[0];
  var root=af[1];
  var xmlDoc=af[2];
  var ps=focuson;
  var ps1=ps.previousSibling;
  while(ps1!=null)
  {
  	ps=ps1;
  	ps1=ps.previousSibling;
  }
  var pt=ps.tagName;
  if(pt=="mml:plus" || pt=="mml:times" || pt=="mml:and" ||pt=="mml:or" || pt=="mml:xor"|| pt=="mml:union"|| pt=="mml:intersect"|| pt=="mml:cartesianproduct")
  {
   
   var s=createElement1(xmlDoc,"mstyle");
   s.setAttribute("mathbackground","#00ff00");
   s.setAttribute("tempinput","1");
   var box0 = createElement1(xmlDoc,"ci");
   box0.appendChild(xmlDoc.createTextNode("\u25A1"));
   s.appendChild(box0);
   var fc=focuson.firstChild;
   var fp=focuson.parentNode;
   fp.replaceChild(fc,focuson);
   fp.appendChild(s);
  }
  currentmath=getxml(root);
  renew();
  savehist();
}

//[section3]: 
function doF34key(a)
{
	if(a==3)
	{
		f34key=3;
	}
	if(a==5)
	{
		f34key=5;
	}
}

function doKey(evt1,a)
{ 	
  var evt,ic,kd;  //ci: kd=1; cn: kd=2
  if(a==1)
  {
  	evt=window.event ? window.event : evt1;
  }else{
  	evt=designWin.event?designWin.event:evt1;
  }
 if(editMode==2||editMode==4||editMode==6)
 {
  if(evt.keyCode==8) return;
  return;
 }
  if(f34key==3 )
 {
  	switch(evt.keyCode)
    {
      case 18:
        return;
      case 114:
        return;
      case 65:
        insertElement('arcsin',6); break;
      case 67:
        insertElement('cos',6); break;
      case 68:
        insertElement('arcsec',6); break;
      case 69:
        insertElement('sec',6); break;
      case 70:
        insertElement('arccsc',6); break;
      case 71:
        insertElement('arccot',6); break;
      case 73:
        insertElement('sin',6); break;
      case 78:
        insertElement('arctan',6); break;
      case 79:
        insertElement('cot',6); break;
      case 82:
        insertElement('arccos',6); break;
      case 83:
        insertElement('csc',6); break;
      case 84:
        insertElement('tan',6); break;
     }
    f34key=0;
    return;
 }
  if(f34key==5)
 {
  	switch(evt.keyCode)
    {
      case 18:
        return;
      case 116:
        return;
      case 65:
        insertChar('\u03B1',1); break;
      case 66:
        insertChar('\u03B2',1); break;
      case 67:
        insertChar('\u03C8',1); break;
      case 68:
        insertChar('\u03B4',1); break;
      case 69:
        insertChar('\u03B5',1); break;
      case 71:
        insertChar('\u03B3',1); break;
      case 72:
        insertChar('\u03C6',1); break;
      case 73:
        insertChar('\u221E',1); break;
      case 76:
       insertChar('\u03BB',1); break;
      case 77:
        insertChar('\u03BC',1); break;
      case 78:
       insertChar('\u03B7',1); break;
      case 79:
        insertChar('\u03C9',1); break;
      case 80:
        insertChar('\u03C0',1); break;
      case 82:
        insertChar('\u03C1',1); break;
      case 83:
        insertChar('\u03C3',1); break;
      case 84:
        insertChar('\u03B8',1); break;
     }
    f34key=0;
    return;
 }
 if(evt.ctrlKey==1)
  {
    switch(evt.keyCode)
    {
    	case 38:
    	  goTop(); break;
    	case 49:
        doContent(); break; 
      case 50:
        doPresentation(); break;
      case 67:
        doCopy(); break;
      case 69:
        doDesign(); break;  
      case 71:
        doStyle('co','b'); break;  
      case 75:
        doStyle('va','italic'); break;      
      case 76:
        doNew(); break;
      case 79:
        doOpen(); break;
      case 81:
        doStyle('va','bold'); break;  
      case 80:
        doPreview(); break;      
      case 82:
        doReturn(); break;
      case 83:
        doSave(); break;
      case 84:
        doStyle('co','f'); break;
      case 86:
        doPaste(); break;
      case 88:
        doCut(); break;
      case 89:
        redo(); break; 
      case 90:
        undo(); break;
      
    }
    return;
  }
  if(evt.altKey==1)
  {
  	if(evt.shiftKey==1)
  	{
  		switch(evt.keyCode)
      {
      	case 48:
          insertElement('interval',19); break;
    	  case 49:
          insertElement('neq',2); break;
        case 50:
          insertElement('product',1); break;
        case 51:
          insertElement('product',12); break; 
        case 55:
          insertElement('and',2); break; 
        case 57:
          insertElement('interval',17); break;
        case 220:
          insertElement('or',2); break; 
      }return;
  	}
  	if(evt.keyCode==114)
  	{
  		doF34key(3);return;
  	}
  	if(evt.keyCode==116)
  	{
  		doF34key(5);return;
  	}
  	switch(evt.keyCode)
    {
    	case 48:
        insertChar('\u2205',1); break;
    	case 49:
        insertElement('not',1); break;
      case 50:
        insertElement('sum',1); break; 
      case 51:
        insertElement('sum',10); break;
      case 52:
        insertElement('sum',12); break;
      case 53:
        insertElement('matrix',14); break;  
    	case 54:
        insertChar("^",1); break;
      case 55:
        insertElement('intersect',2); break;
      case 56:
        insertElement('cartesianproduct',2); break;
      case 57:
        insertElement('implies',2); break;
      case 107:  //firefox '='
         insertElement('equivalent',2); break;
      case 61:  //firefox '='
         insertElement('equivalent',2); break;
      case 65:
        insertElement('abs',1); break;
      case 66:
        insertElement('notin',2); break;
      case 67:
        insertElement('ceiling',1); break;
      case 68:
        insertElement('diff',7); break;   
      case 69:
        insertElement('exists',7); break;
      case 70:
        insertElement('floor',1); break;
      case 71:
        insertElement('log',9); break;
      case 72:
        insertElement('int',12); break;  
      case 73:
        insertElement('in',2); break;   
      case 74:
       insertElement('notprsubset',2); break;
      case 75:
       insertElement('notsubset',2); break;
      case 76:
       insertElement('log',1); break;
      case 77:
        insertElement('limit',12); break;
    	case 78:
        insertElement('ln',1); break;
      case 79:
        insertElement('card',1); break;
      case 80:
        insertElement('prsubset',2); break;
      case 81:
        insertElement('partialdiff',7); break;
      case 82:
        insertElement('root',8); break;
      case 83:
        insertElement('root',1); break;
      case 84:
        insertElement('matrix',13); break; 
      case 85:
        insertElement('subset',2); break;
      case 86:
        insertElement('vector',15); break; 
      case 87:
        insertElement('int',11); break;  
      case 88:
       insertElement('xor',2); break;
      case 89:
      insertElement('forall',7); break;
      case 90:
       insertElement('factorof',2); break;
      case 109:
        insertElement('minus',1); break; 
      case 187:
        insertElement('equivalent',2); break; 
      case 188:
        insertElement('leq',2); break; 
      case 189:
        insertElement('minus',1); break; 
      case 190:
        insertElement('geq',2); break; 
      case 191:
        insertElement('setdiff',2); break; 
      case 219:
        insertElement('interval',18); break; 
      case 220:
        insertElement('union',2); break; 
      case 221:
        insertElement('interval',16); break; 
    }return;
  }
  if(evt.shiftKey==1)
  {
  	switch(evt.keyCode)
  	{
  		case 16:
  		   ic="shift";  break;
  		case 48:
  		   ic=")"; kd=1; break;
  		case 49:
  		  insertElement('factorial',1);ic="operation";break;
  		case 50:
  		   ic="@"; kd=1; break;
  		case 51:
  		case 52:
  		case 53:
  		   ic=String.fromCharCode(evt.keyCode-16);kd=1;
  		   break;
  		case 54:
  		   insertElement('power',2); break;
  		case 55:
  		   ic="&"; kd=1; break;
  		case 56:
  		   insertElement("times",20); ic="operation"; break;
  		case 57:
  		   ic="("; kd=1; break;  
  		case 61:
  		   insertElement("plus",22); ic="operation";  break;
  		case 107:
  		   insertElement("plus",22); ic="operation";  break;
  		case 109:
  		    ic="_"; kd=1; break;
  		case 186:
  	     ic=":"; kd=1; break;
  		case 187:
  		   insertElement("plus",22); ic="operation";  break;
  		case 188:
  		   insertElement("lt",2); ic="operation"; break;
  	  case 189:
  		    ic="_"; kd=1; break;
  		case 190:
  		   insertElement("gt",2); ic="operation"; break;  
  	  case 191:
  		    ic="?"; kd=1; break;
  	  case 192:
  		  insertElement('approx',2); ic="operation"; break;  
  	  case 219:
  	     ic="{"; kd=1; break;
  	  case 220:
  	     ic="|"; kd=1; break;
  	  case 221:
  	     ic="}"; kd=1; break;
  	  case 222:
  		   ic="\""; kd=1; break;
 	  }
  	if(evt.keyCode>=65 && evt.keyCode<=90 )//uppercase
    {
  	  ic=String.fromCharCode(evt.keyCode);
  	  kd=1; 
  	}
  }else //not press shift key
  {
    switch(evt.keyCode)
  	{
  		case 107:
  		   insertElement("eq",2); ic="operation"; break;
  		case 106:
  		   insertElement("times",20); ic="operation"; break;
  		case 61:
  		   insertElement("plus",22); ic="operation"; break;
  		case 109:
  		   insertElement("minus",21); ic="operation"; break;
      case 111:
  		   insertElement("divide",2); ic="operation"; break;
  		case 186:
  	     ic=";"; kd=1; break;
  		case 187:
  		   insertElement("eq",2); ic="operation"; break;
  	  case 188:
  	     ic=","; kd=1; break;
  	  case 189:
  		   insertElement("minus",21); ic="operation"; break;
  	  case 190:
  		   ic="."; kd=2; break;
  		case 191:
  		   insertElement("divide",2); ic="operation"; break;
  		case 219:
  	     ic="["; kd=1; break;
  	  case 220:
  	     ic="\\"; kd=1; break;
  	  case 221:
  	     ic="]"; kd=1; break;
  		case 222:
  		   ic="'"; kd=1; break;
  		
   	}
    if(evt.keyCode>=65 && evt.keyCode<=90)//lowercase
    {   
   	     ic=String.fromCharCode(evt.keyCode+32);
   	     kd=1;
   	}
    if(evt.keyCode >=48 && evt.keyCode<=57)//numeric key
    { 
         ic=String.fromCharCode(evt.keyCode);
         kd=2;
    }
    if(evt.keyCode >=96 && evt.keyCode<=105)//numeric key
    {
         ic=String.fromCharCode(evt.keyCode-48);
         kd=1;
    }
  }  		
  if(evt.keyCode>=37 && evt.keyCode<=40 || evt.keyCode==34 || evt.keyCode==33 || evt.keyCode==9)
  {
   	doNavigate(evt.keyCode);
  }else if(evt.keyCode==8 || evt.keyCode==46)
  {
   		doDelete(evt.keyCode);
 	}else if(evt.keyCode==13)
  {
   		doEnter();
 	}else if(ic!="shift" && ic!="operation" && ic!=undefined)
  {
      insertChar(ic,kd);
  }
}

function domouseclick()
{	 
	if(getOs()==1)return;
	if(editMode==2 || editMode==3 || editMode==4)return;
	if(editMode==1)
	{
	   var s = designWin.getSelection();
     var cpnum1=s.focusNode.parentNode.getAttribute("id");
 	   var xmlDoc=createMSXML();
	   var root=xmlDoc.documentElement;
	   var mstyles=getElementsByTagName1(xmlDoc,"mstyle");
	   num_mstyles=mstyles.length;
	   for (i = 0; i < num_mstyles; i++) 
     { 
        mstyle= mstyles.item(i); 
        mstyleAttr = mstyle.getAttribute("tempinput"); 
       if(mstyleAttr=="1")
       {
   	     var focuson=mstyle;
     	}
     }
     var focuschild1=focuson.firstChild;
     var cpnum2=focuschild1.getAttribute("id");
     if(cpnum1==cpnum2)
     {
       return;
      }
     else if(cpnum1!=null)
     {
     	 var nf=xmlDoc.getElementById(cpnum1);
     	 var nf1=nf.cloneNode(true);
     	 focuson.parentNode.replaceChild(focuschild1,focuson);
     	 var ms=createElement1(xmlDoc,"mstyle");
       ms.setAttribute("mathbackground","#00ff00");
       ms.setAttribute("tempinput","1");
       ms.appendChild(nf1);
       nf.parentNode.replaceChild(ms,nf);
       currentmath=getxml(root);
       renew();
     }
  }
}
function goTop()
{
	cm1=new Array();
  cm1=getCode();
	currentmath=cm1[0];
	currentmath=addFocus();
	renew();
}
function getElementsByTagName1(xmlDoc1,tagName1)
{
		var tagName2=mml+tagName1;
		var et=xmlDoc1.getElementsByTagName(tagName2);
		if(et.length==0)
		 et=xmlDoc1.getElementsByTagName(tagName1); 
		return et;
}
function createElement1(xmlDoc1,element1)
{
	if(getOs()==1)
	{
		var element2=mml+element1;
		return xmlDoc1.createElement(element2);
	}else
	{
		return xmlDoc1.createElementNS(mmlns,element1);
	}	
}
function doNavigate(kc)
{  
	 var xmlDoc=createMSXML();
	 var root=xmlDoc.documentElement;
	 var mstyles=getElementsByTagName1(xmlDoc,"mstyle");
	 num_mstyles=mstyles.length;
	 for (i = 0; i < num_mstyles; i++) 
   { 
    mstyle= mstyles.item(i); 
    mstyleAttr = mstyle.getAttribute("tempinput"); 
    if(mstyleAttr=="1")
    {
   	 focuson=mstyle;
   	}
   }
	var focusparent=focuson.parentNode;
	var focuschild=focuson.firstChild;
	var mstyle=createElement1(xmlDoc,"mstyle");
  mstyle.setAttribute("mathbackground","#00ff00");
  mstyle.setAttribute("tempinput","1");
  var nesting1;
  var node2=findnode(focuson,kc);
  if(typeof(node2)=="string")
	{
		if(node2=="notfind") return;
	}
	focusparent.replaceChild(focuschild,focuson);
	node2.parentNode.replaceChild(mstyle,node2);
  mstyle.appendChild(node2);
  currentmath=getxml(root);
  renew();
}
function getxml(node1,ns)
{
	if(getOs()==1)
	{
		return node1.xml;
	}else
	{
	 
	 var ds=document.getElementById("selectedMath");
   ds.innerHTML="";
   var dsc=node1.cloneNode(true);
   ds.appendChild(dsc);
   var nodexml=ds.innerHTML;
   nodexml=nodexml.replace("mml=","xmlns=");
   //alert(nodexml.toString());
   return nodexml;
 //var nodexml=GetMathML(node1);
 //alert("suwei"+nodexml);
 //return nodexml;
  }
}

function findnode(node1,orient)
{
	var finalNode;
	if(orient==34 || orient==9)//pageDown
	{
		var finalNode=node1.firstChild.firstChild.nextSibling;
		if(finalNode==null || finalNode.firstChild==null)
		{
			
			finalNode=node1.nextSibling;
			if(finalNode==null)
		  {
  			nodeP=node1.parentNode;
  			finalNode=nodeP.nextSibling;
  			while(nodeP.nextSibling==null)
  			{
  			  nodeP=nodeP.parentNode;
  			  tempstyleAttr = nodeP.getAttribute("tempstyle");
  			  if(tempstyleAttr=="1")
  			  {
  			  	finalNode=nodeP.firstChild;
  			  	break;
  			  }
  			  finalNode=nodeP.nextSibling;
  			}
  			
		  }
		}
		if(judgenesting(finalNode)==1)
    {
    	  while(judgenesting(finalNode)==1)
    	  finalNode=finalNode.firstChild;
    } 
	}
	if(orient==33)//pageUp
	{
		var finalNode=node1.previousSibling;
		if(finalNode==null || finalNode.firstChild==null)
		{
			
			finalNode=node1.parentNode;
  	  tempstyleAttr = finalNode.getAttribute("tempstyle");
  	  if(tempstyleAttr=="1")
  		{
  		  	finalNode=node1.lastChild;
  		  	while(finalNode.lastChild.lastChild!=null)
  		  	{
  		  	  finalNode=finalNode.lastChild;
  		    }
  		}else
  		{
  			if(judgenesting(finalNode)==1)
        {
    	     finalNode=findnode(finalNode,33)
         } 
  		}		
		}else
		{
  		while(finalNode.lastChild.lastChild!=null)
  		{
  		  finalNode=finalNode.lastChild;
  		 }
  	if(judgenesting(finalNode)==1)
    {
    	  while(judgenesting(finalNode)==1)
    	  finalNode=finalNode.firstChild;
    } 
		}
		
	}
	if(orient==37)//left
	{
		var preFocuson=node1.previousSibling;
	  if(preFocuson==null || preFocuson.firstChild==null || judgetf(preFocuson.firstChild)==1)
		{
			if(judgenesting(node1.parentNode)==1)
			{
				finalNode=findnode(node1.parentNode,orient);
			}else
			{
			  finalNode="notfind";
		  }
		}else
		{
			while(judgenesting(preFocuson)==1)
			{
				preFocuson=preFocuson.firstChild;
		  }
		  finalNode=preFocuson;
		}
	}
	if(orient==40)//down
	{
		var focusgrandchild=node1.firstChild.firstChild.nextSibling; 
		if(focusgrandchild==null || focusgrandchild.firstChild==null)
		{
			finalNode="notfind";
		}else
		{
		  if(judgenesting(focusgrandchild)==1)
      {
    	  while(judgenesting(focusgrandchild)==1)
    	  focusgrandchild=focusgrandchild.firstChild;
    	  finalNode=focusgrandchild;
       }else{
	      finalNode=focusgrandchild; 
		   }
	   }
	}
	if(orient==38)//up
	{
		nodeP=node1.parentNode;
		tempstyleAttr = nodeP.getAttribute("tempstyle");
	  if(tempstyleAttr=="1")
		{
			finalNode="notfind"; 
		}else
		{
	   if(judgenesting(nodeP)==1)
	   {
	   	// while(judgenesting(nodeP)==1)
	   	//   nodeP=nodeP.parentNode;
	   	 finalNode=findnode(nodeP,orient);
	   }else{
	    finalNode=nodeP;
		 }
	  }
	}
	if(orient==39)//right
	{
		var focusparent=node1.parentNode;
		nesting1=judgenesting(focusparent);
	  var nodenext=node1.nextSibling;
		if(nodenext==null)
		{
			if(nesting1==1)
			{
				finalNode=findnode(focusparent,39);
		  }else
		  {
		  	finalNode="notfind";	
		  }  
		}
		 else
		{	
		  while(judgenesting(nodenext)==1)
		  {
		  	nodenext=nodenext.firstChild;
		  }
		  finalNode=nodenext;
		}
	}
	return finalNode;
}
function judgetf(node1)
{
	var ne=new Array();
	var tagname1=node1.tagName;
	
  ne[0]="sin";ne[1]="arcsin";ne[2]="cos";ne[3]="arccos";
  ne[4]="tan";ne[5]="arctan";ne[6]="cot";ne[7]="arccot"; 
  ne[8]="sec";ne[9]="arcsec";ne[10]="csc";ne[11]="arccsc";   //nesting element
  var tf=0;
	for(var i=0;i<ne.length;i++)
  {
  	if(tagname1==mml+ne[i] || tagname1==ne[i]) tf=1;
  }
	return tf;
}
function judgenesting(node1)
{
	var tagname1=node1.tagName;
	var ne=new Array();
  ne[0]="uplimit";ne[1]="lowlimit";ne[2]="degree";      
  ne[3]="matrixrow";ne[4]="condition";
  ne[5]="domainofapplication";ne[6]="logbase";
  ne[7]="bvar"; ne[8]="mstyle";ne[9]="fn";//nesting element
  ne[10]="semantics";
  var nesting1=0;
	for(var i=0;i<ne.length;i++)
  {
  	if(tagname1==mml+ne[i] || tagname1==ne[i]) nesting1=1;
  }
  if(tagname1==mml+"ci" ||tagname1=="ci")
  {
   	if(node1.getAttribute("type")=="bvar")
  	nesting1=1;
  }
  return nesting1; 	
}

function doDelete(kc)
{
	 var xmlDoc=createMSXML();
	 var root=xmlDoc.documentElement;
	 var mstyles=getElementsByTagName1(xmlDoc,"mstyle");
	 num_mstyles=mstyles.length;
	 for (i = 0; i < num_mstyles; i++) 
   { 
     mstyle= mstyles.item(i); 
     mstyleAttr = mstyle.getAttribute("tempinput"); 
     if(mstyleAttr=="1" || mstyleAttr=="2")
     {
   	  focuson=mstyle;
     }
   }
   var s=createElement1(xmlDoc,"mstyle");
   s.setAttribute("mathbackground","#00ff00");
   s.setAttribute("tempinput","1");
   if((focuson.firstChild.nodeName=="mml:ci" || focuson.firstChild.nodeName=="mml:cn" || focuson.firstChild.nodeName=="cn" || focuson.firstChild.nodeName=="ci" || focuson.firstChild.nodeName=="cn") && kc==8 && focuson.firstChild.firstChild.length>1)
   {
   	  var ciStr=focuson.firstChild.firstChild.text;
   	  ciStr=ciStr.substr(0,(ciStr.length-1));
   	  var box1 = createElement1(xmlDoc,"ci");
   	  box1.setAttribute("id",++idnum);
      box1.appendChild(xmlDoc.createTextNode(ciStr));
      s.appendChild(box1);
   }else
   {
     var box0 = createElement1(xmlDoc,"ci");
     box0.appendChild(xmlDoc.createTextNode("\u25A1"));
     box0.setAttribute("id",++idnum);
     s.appendChild(box0);
   }
   PN=focuson.parentNode;
   PN.replaceChild(s,focuson);
   currentmath=getxml(root);
   renew();
   savehist();
}


function doDesign()
{
	 var ms=document.getElementById("mathsign");
   var tb=document.getElementById("toolbar2");
   var si=document.getElementById("sinfix");
   if(editMode==1)
   {
     alert("already in Design Mode");
    return;}
  if(editMode==2)
  { var c=currentmath;
  	currentmath=designDoc.f2.mathcode.value;
  	if(getOs()>=2)
    {
     designDoc.body.innerHTML="";
     solvematrixdisplay(designDoc);
     designDoc.addEventListener("keydown", doKey, false);
     designDoc.addEventListener("click", domouseclick, false);
    }
   renew();
   if(c!=currentmath)
   {
   	savehist();
   }   
   if(si!=null && si!="")
   { si.style.display="";}
   if(ms!=null || ms!="")
   { ms.style.display="";}
   if(tb!=null ||tb!="")
   {tb.style.display="";}
  }
   if(editMode==3)
  { 
   if(getOs()>=2)
    {
     designDoc.body.innerHTML="";
     solvematrixdisplay(designDoc);
     designDoc.addEventListener("keydown", doKey, false);
     designDoc.addEventListener("click", domouseclick, false);
    }
   renew();
    if(si!=null && si!="")
   { si.style.display="";}
   if(ms!=null || ms!="")
   { ms.style.display="";}
   if(tb!=null ||tb!="")
   {tb.style.display="";}
   }
  if(editMode==4)
  { var c=currentmath;
  	currentmath=addprefix(designDoc.f4.mathcode.value);
    if(getOs()>=2)
    {
     designDoc.body.innerHTML="";
     solvematrixdisplay(designDoc);
     designDoc.addEventListener("keydown", doKey, false);
     designDoc.addEventListener("click", domouseclick, false);
    }
    renew();
    var c1=c.replace(/id="."/gi,"");
    var c2=currentmath.replace(/id="."/gi,"");
    if(c1!=c2)
    {
   	 savehist();
    }
   if(si!=null && si!="")
   { si.style.display="";}
   if(ms!=null || ms!="")
   { ms.style.display="";}
   if(tb!=null ||tb!="")
   {tb.style.display="";}
   }
  editMode=1;
}


function doContent()
{
   var ms=document.getElementById("mathsign");
   var tb=document.getElementById("toolbar2");
   var si=document.getElementById("sinfix");
   if(editMode==2)
   {
     alert("already in MathML Content Mode");
     return;
   }
   if(editMode==1)
   {
   designDoc.body.innerHTML="";
   designDoc.write("<div style='background-color:#0066ff;color:#ff6600;font-weight: bold'>The MathML Content Code are:</div>");
   designDoc.write("<form name='f2'><textarea name='mathcode' wrap='virtual' cols='68' rows='15' style='border:0'>"+currentmath+"</textarea></form>");
   if(si!=null && si!="")
   { si.style.display="none";}
   if(ms!=null || ms!="")
   { ms.style.display="none";}
   if(tb!=null ||tb!="")
   {tb.style.display="none";}
   }
    if(editMode==3)
  {
   designDoc.body.innerHTML="";
   designDoc.write("<div style='background-color:#0066ff;color:#ff6600;font-weight: bold'>The MathML Content Code are:</div>");
   designDoc.write("<form name='f2'><textarea name='mathcode' wrap='virtual' cols='68' rows='15' style='border:0'>"+currentmath+"</textarea></form>");
   if(si!=null && si!="")
   { si.style.display="none";}
   if(ms!=null || ms!="")
   { ms.style.display="none";}
   if(tb!=null ||tb!="")
   {tb.style.display="none";}
   }
  if(editMode==4)
 { currentmath=addprefix(designDoc.f4.mathcode.value);
   designDoc.body.innerHTML="";
   designDoc.write("<div style='background-color:#0066ff;color:#ff6600;font-weight: bold'>The MathML Content Code are:</div>");
   designDoc.write("<form name='f2'><textarea name='mathcode' wrap='virtual' cols='68' rows='15' style='border:0'>"+currentmath+"</textarea></form>");
   if(si!=null && si!="")
   { si.style.display="none";}
   if(ms!=null || ms!="")
   { ms.style.display="none";}
   if(tb!=null ||tb!="")
   {tb.style.display="none";}
  }
  editMode=2;
}

function doPresentation()
{
	 var ms=document.getElementById("mathsign");
   var tb=document.getElementById("toolbar2");
   var si=document.getElementById("sinfix");
   if(editMode==3)
   {
     alert("already in MathML Presentation Mode");
     return;
   }
  if(editMode==1)
  { 
  	
   	var mp=mctompStr(currentmath);
    designDoc.body.innerHTML="";
    designDoc.write("<div style='background-color:#0066ff;color:#ffff00;font-weight: bold'>The MathML Presentation Code are:</div>");
    designDoc.write("<form name='f3'><textarea name='mathcode' wrap='virtual' cols='68' rows='15' style='border:0'>"+mp+"</textarea></form>");
    if(si!=null && si!="")
    { si.style.display="none";}
    if(ms!=null || ms!="")
    { ms.style.display="none";}
    if(tb!=null ||tb!="")
    {tb.style.display="none";}
   }
  if(editMode==2)
  {
    var currentmathP=mctompStr(designDoc.f2.mathcode.value);
    designDoc.body.innerHTML="";
    designDoc.write("<div style='background-color:#0066ff;color:#ffff00;font-weight: bold'>The MathML Presentation Code are:</div>");
    designDoc.write("<form name='f3'><textarea name='mathcode'  cols='68' rows='15' style='border:0'>"+currentmathP+"</textarea></form>");
    if(si!=null && si!="")
    { si.style.display="none";}
    if(ms!=null || ms!="")
    { ms.style.display="none";}
    if(tb!=null ||tb!="")
    {tb.style.display="none";}
  }
  if(editMode==4)
  { 
  	currentmath=addprefix(designDoc.f4.mathcode.value);
 	  var currentmathP=mctompStr(currentmath);
    designDoc.body.innerHTML="";
    designDoc.write("<div style='background-color:#0066ff;color:#ffff00;font-weight: bold'>The MathML Presentation Code are:</div>");
    designDoc.write("<form name='f3'><textarea name='mathcode' wrap='virtual' cols='68' rows='15' style='border:0'>"+currentmathP+"</textarea></form>");
    if(si!=null && si!="")
    { si.style.display="none";}
    if(ms!=null || ms!="")
    { ms.style.display="none";}
    if(tb!=null ||tb!="")
    {tb.style.display="none";}
  }
  editMode=3;
}

function doInfix()
{  
	 var ms=document.getElementById("mathsign");
   var tb=document.getElementById("toolbar2");
   var si=document.getElementById("sinfix");
	 if(editMode==4)
   {
     alert("already in infix Mode");
     return;
   }
   if(editMode==1)
   {
   var outmathml=strConvert(currentmath);
   designDoc.body.innerHTML="";
   designDoc.write("Infix display:");
   designDoc.write("<form name='f4'><textarea name='mathcode' wrap='virtual' cols='68' rows='15' style='border:0'>"+outmathml+"</textarea></form>");
   if(si!=null && si!="")
   { si.style.display="none";}
   if(ms!=null || ms!="")
   { ms.style.display="none";}
   if(tb!=null ||tb!="")
   {tb.style.display="none";}
   }
  if(editMode==2)
  {
   var outmathml=strConvert(designDoc.f2.mathcode.value);
   designDoc.body.innerHTML="";
   designDoc.write("Infix display:");
   designDoc.write("<form name='f4'><textarea name='mathcode' wrap='virtual' cols='68' rows='15' style='border:0'>"+outmathml+"</textarea></form>");
   if(si!=null && si!="")
   { si.style.display="none";}
   if(ms!=null || ms!="")
   { ms.style.display="none";}
   if(tb!=null ||tb!="")
   {tb.style.display="none";}
  }
  if(editMode==3)
  {
   var outmathml=strConvert(currentmath);
   designDoc.body.innerHTML="";
   designDoc.write("Infix display:");
   designDoc.write("<form name='f4'><textarea name='mathcode' wrap='virtual' cols='68' rows='15' style='border:0'>"+outmathml+"</textarea></form>");
   if(si!=null && si!="")
   { si.style.display="none";}
   if(ms!=null || ms!="")
   { ms.style.display="none";}
   if(tb!=null ||tb!="")
   {tb.style.display="none";}
  }
   editMode=4;
   }

function doPreview()
{	
 var dlg;
 if(editMode==1)
 {
 	cm1=new Array();
  cm1=getCode();
  var currentmath3=cm1[0];
  dlg=window.open("", "preview",
			      "toolbar=no,menubar=no,personalbar=no,width=400,height=400," +
			      "scrollbars=no,resizable=yes");
			       
  dlg.document.body.innerHTML="";
  dlg.document.title="Preview Your Mathematical Expression";
  if(getOs()==1)
  {
   dlg.document.write(mmlparse+currentmath3+mmlparse1);
  }else
  {
  	var mp=mctomp(mmlparse+currentmath3+mmlparse1);
  	solvematrixdisplay(dlg.document);
  	dlg.document.body.innerHTML="";
  	dlg.document.body.appendChild(mp);
  }
 }
 if(editMode==2)
 {
 	currentmath=designDoc.f2.mathcode.value;
 	cm1=new Array();
  cm1=getCode();
  var currentmath3=cm1[0];
 dlg=window.open("", "preview",
			      "toolbar=no,menubar=no,personalbar=no,width=400,height=400," +
			      "scrollbars=no,resizable=yes");
			       
 dlg.document.body.innerHTML="";
 dlg.document.title="Preview Your Mathematical Expression";
 if(getOs()==1)
  {
   dlg.document.write(mmlparse+currentmath3+mmlparse1);
  }else
  {
  	var mp=mctomp(mmlparse+currentmath3+mmlparse1);
  	solvematrixdisplay(dlg.document);
  	dlg.document.body.innerHTML="";
  	dlg.document.body.appendChild(mp);
  }
 }
 
 if(editMode==3)
 {
  cm1=new Array();
  cm1=getCode();
  var currentmath3=cm1[0];
 dlg=window.open("", "preview",
			      "toolbar=no,menubar=no,personalbar=no,width=400,height=400," +
			      "scrollbars=no,resizable=yes");
			       
 dlg.document.body.innerHTML="";
 dlg.document.title="Preview Your Mathematical Expression";
 if(getOs()==1)
  {
   dlg.document.write(mmlparse+currentmath3+mmlparse1);
  }else
  {
  	var mp=mctomp(mmlparse+currentmath3+mmlparse1);
  	solvematrixdisplay(dlg.document);
  	dlg.document.body.innerHTML="";
  	dlg.document.body.appendChild(mp);
  }
}

 if(editMode==4)
 { 	
  currentmath=addprefix(designDoc.f4.mathcode.value);
  cm1=new Array();
  cm1=getCode();
  var currentmath3=cm1[0];
 dlg=window.open("", "preview",
			      "toolbar=no,menubar=no,personalbar=no,width=400,height=400," +
			      "scrollbars=no,resizable=yes");
			       
 dlg.document.body.innerHTML="";
 dlg.document.title="Preview Your Mathematical Expression";
 if(getOs()==1)
  {
   dlg.document.write(mmlparse+currentmath3+mmlparse1);
  }else
  {
  	var mp=mctomp(mmlparse+currentmath3+mmlparse1);
  	solvematrixdisplay(dlg.document);
  	dlg.document.body.innerHTML="";
  	dlg.document.body.appendChild(mp);
  }
 }
}

function addFocus()
{
 var xmlDoc=createMSXML();
 var root=xmlDoc.documentElement;
 var mstyles=getElementsByTagName1(xmlDoc,"mstyle");
 var num_mstyles=mstyles.length;
 var mstyle=null;
 var  mstyleAttr="";
 var tmpStyle=null;
 var tmpStyleAttr;
 for (i = 0; i < num_mstyles; i++) 
 { 
   mstyle= mstyles.item(i); 
   mstyleAttr = mstyle.getAttribute("tempinput"); 
   if(mstyleAttr=="1")
   {
   	if(mstyle.getAttribute("mathbackground")!="" ||	mstyle.getAttribute("mathbackground")!=null)
   	return currentmath;
   	}
  }
 for (i = 0; i < num_mstyles; i++)
 {
  tmpStyle= mstyles.item(i);
  tmpStyleAttr = tmpStyle.getAttribute("tempstyle");
  if(tmpStyleAttr=="1")
  {
   	if(tmpStyle.parentNode.tagName=="mml:math" ||tmpStyle.parentNode.tagName=="math")
   	{
   		var s=createElement1(xmlDoc,"mstyle");
      s.setAttribute("mathbackground","#00ff00");
      s.setAttribute("tempinput","1");
     	var tmpChild=tmpStyle.firstChild;
     	tmpStyle.replaceChild(s,tmpChild);
      s.appendChild(tmpChild);
      return getxml(root);
    }
  }else return currentmath;
 }
}
function XslDom() 
{
 var arrSignatures = ["MSXML2.FreeThreadedDOMDocument.4.0","MSXML2.FreeThreadedDOMDocument.3.0"];
 for(var i=0; i<arrSignatures.length;i++) 
 {
  try
  {
     var oXslDom=new ActiveXObject(arrSignatures[i]);
     return oXslDom;
  }catch(oError) 
  {
  }
 }
 throw new Error("IE v6.0+ is required!");
}
function XSLTemplate(){
 var arrSignatures = ["Msxml2.XSLTemplate.4.0","MSXML2.XSLTemplate","MSXML2.XSLTemplate.4.0","Msxml2.XSLTemplate.5.0","MSXML2.XSLTemplate.3.0"];
 for(var i=0; i<arrSignatures.length;i++)
 {
  try{

   var tempalte=new ActiveXObject(arrSignatures[i]);
         return tempalte;

  }catch(oError) {

  }
 }
 throw new Error("IE v6.0+ is required!");
}

function getCode()
{
 var xmlDoc=createMSXML();
 var root=xmlDoc.documentElement;
 var mstyles=getElementsByTagName1(xmlDoc,"mstyle");
 num_mstyles=mstyles.length;
 for (i = 0; i < num_mstyles; i++) 
 { 
   var mstyle= mstyles.item(i); 
   var mstyleAttr = mstyle.getAttribute("tempinput"); 
   if(mstyleAttr=="1")
   {
   	focuson=mstyle;
   	}
  }
  focuson.parentNode.replaceChild(focuson.firstChild,focuson);
  mc= new Array(5);
  mc[0]=getxml(root);
  var outmathml=strConvert(mc[0]);
  mc[1]=outmathml;
  var infpre=mctompStr(mc[0]);
  mc[2]=infpre;
  //alert(mc[2].toString()+"getCode");
  return(mc);
}

function savehist()
{
  if(histp==49)
  {histp=0;}
  else
  {histp=histp+1;}
  histmath[histp]=currentmath;
  histr=0;
}
function undo()
{
	//alert(histr);
   if(histr==49)
   {
    alert("Can't Undo"); return;
   }
   if(histp==0)
   {
     if(histmath[49]==undefined || histmath[49]=="")
     {
      alert("Can't Undo");
      return;
     }else
     {
       currentmath=histmath[49];
       histp=49;
     }
   }else
   {
    currentmath=histmath[--histp];
   }
  renew();
  histr=histr+1;
}
function redo()
{
  if(histr==0)
   {
    alert("Can't Redo"); return;
   }else
   {
     if(histp==49)
     {
       histp=0;
       currentmath=histmath[histp];
     }else
     {
       currentmath=histmath[++histp];
     }
   }
  renew();
  histr=histr-1;
}
function createMSXML(xcm) //Load XML in firefox and IE.
{
	
	if(xcm=="" || xcm==null || xcm=="undefined")
	{
		xcm=currentmath;
	}
  if(getOs()>=2)
  {
    var parser = new DOMParser();
    var xmlDoc = parser.parseFromString(xcm.toString(), "text/xml");
    return xmlDoc;
  }
  else if(getOs()==1)
  {
    var aVersions = [ "MSXML2.DOMDocument.5.0",
       "MSXML2.DOMDocument.4.0","MSXML2.DOMDocument.3.0",
       "MSXML2.DOMDocument","Microsoft.XmlDom"];
    for (var i = 0; i < aVersions.length; i++) 
    {
        try {
             var xmlDoc = new ActiveXObject(aVersions[i]);
	           xmlDoc.async=false;
	           xmlDoc.loadXML(xcm);
             return xmlDoc;
         } catch (oError) {
        }
    }
    throw new Error("MSXML is not installed.");
  }
}

function addprefix(con) 
{
  var result=convertToContentDOM(con);
  if(getOs()==1)
  {
   var STR = GetMathMLEx(result);
  }else
  {
  	var STR = GetMathMLEx(result,"mml");
  }
  var currentmath3='<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">'+STR+'</mml:math>';
  var xmlDoc1=createMSXML(currentmath3);
  var root1=xmlDoc1.documentElement;
  var s=createElement1(xmlDoc1,"mstyle");
  s.setAttribute("tempstyle","1");
  s.setAttribute("mathsize","20pt");
  s.appendChild(root1.firstChild);
  root1.appendChild(s);
  addIdAttribute(root1,0);
  currentmath=getxml(root1);
  currentmath=addFocus();
  currentmath=addfn(currentmath);
  return currentmath;
}
function addfn(cm)
{
	cm=cm.replace(/<sin><\/sin>/gi,"<fn><sin/></fn>");
	cm=cm.replace(/<mml:sin\/>/gi,"<mml:fn><mml:sin/></mml:fn>");
	cm=cm.replace(/<cos><\/cos>/gi,"<fn><cos/></fn>");
	cm=cm.replace(/<mml:cos\/>/gi,"<mml:fn><mml:cos/></mml:fn>");
	cm=cm.replace(/<tan><\/tan>/gi,"<fn><tan/></fn>");
	cm=cm.replace(/<mml:tan\/>/gi,"<mml:fn><mml:tan/></mml:fn>");
	cm=cm.replace(/<cot><\/cot>/gi,"<fn><cot/></fn>");
	cm=cm.replace(/<mml:cot\/>/gi,"<mml:fn><mml:cot/></mml:fn>");
	cm=cm.replace(/<sec><\/sec>/gi,"<fn><sec/></fn>");
	cm=cm.replace(/<mml:sec\/>/gi,"<mml:fn><mml:sec/></mml:fn>");
	cm=cm.replace(/<csc><\/csc>/gi,"<fn><csc/></fn>");
	cm=cm.replace(/<mml:csc\/>/gi,"<mml:fn><mml:csc/></mml:fn>");
	
	cm=cm.replace(/<arcsin><\/arcsin>/gi,"<fn><arcsin/></fn>");
	cm=cm.replace(/<mml:arcsin\/>/gi,"<mml:fn><mml:arcsin/></mml:fn>");
	cm=cm.replace(/<arccos><\/arccos>/gi,"<fn><arccos/></fn>");
	cm=cm.replace(/<mml:arccos\/>/gi,"<mml:fn><mml:arccos/></mml:fn>");
	cm=cm.replace(/<arctan><\/arctan>/gi,"<fn><arctan/></fn>");
	cm=cm.replace(/<mml:arctan\/>/gi,"<mml:fn><mml:arctan/></mml:fn>");
	cm=cm.replace(/<arccot><\/arccot>/gi,"<fn><arccot/></fn>");
	cm=cm.replace(/<mml:arccot\/>/gi,"<mml:fn><mml:arccot/></mml:fn>");
	cm=cm.replace(/<arcsec><\/arcsec>/gi,"<fn><arcsec/></fn>");
	cm=cm.replace(/<mml:arcsec\/>/gi,"<mml:fn><mml:arcsec/></mml:fn>");
	cm=cm.replace(/<arccsc><\/arccsc>/gi,"<fn><arccsc/></fn>");
	cm=cm.replace(/<mml:arccsc\/>/gi,"<mml:fn><mml:arccsc/></mml:fn>");
	return cm;
}
function rmfn(codeStr)
{
	codeStr=codeStr.replace(/<fn><sin><\/sin><\/fn>/gi,"<sin/>");
	codeStr=codeStr.replace(/<mml:fn><mml:sin\/><\/mml:fn>/gi,"<mml:sin/>");
	codeStr=codeStr.replace(/<fn><cos><\/cos><\/fn>/gi,"<cos/>");
	codeStr=codeStr.replace(/<mml:fn><mml:cos\/><\/mml:fn>/gi,"<mml:cos/>");
	codeStr=codeStr.replace(/<fn><tan><\/tan><\/fn>/gi,"<tan/>");
	codeStr=codeStr.replace(/<mml:fn><mml:tan\/><\/mml:fn>/gi,"<mml:tan/>");
	codeStr=codeStr.replace(/<fn><cot><\/cot><\/fn>/gi,"<cot/>");
	codeStr=codeStr.replace(/<mml:fn><mml:cot\/><\/mml:fn>/gi,"<mml:cot/>");
	codeStr=codeStr.replace(/<fn><sec><\/sec><\/fn>/gi,"<sec/>");
	codeStr=codeStr.replace(/<mml:fn><mml:sec\/><\/mml:fn>/gi,"<mml:sec/>");
	codeStr=codeStr.replace(/<fn><csc><\/csc><\/fn>/gi,"<csc/>");
	codeStr=codeStr.replace(/<mml:fn><mml:csc\/><\/mml:fn>/gi,"<mml:csc/>");
	
	codeStr=codeStr.replace(/<fn><arcsin><\/arcsin><\/fn>/gi,"<arcsin/>");
	codeStr=codeStr.replace(/<mml:fn><mml:arcsin\/><\/mml:fn>/gi,"<mml:arcsin/>");
	codeStr=codeStr.replace(/<fn><arccos><\/arccos><\/fn>/gi,"<arccos/>");
	codeStr=codeStr.replace(/<mml:fn><mml:arccos\/><\/mml:fn>/gi,"<mml:arccos/>");
	codeStr=codeStr.replace(/<fn><arctan><\/arctan><\/fn>/gi,"<arctan/>");
	codeStr=codeStr.replace(/<mml:fn><mml:arctan\/><\/mml:fn>/gi,"<mml:arctan/>");
	codeStr=codeStr.replace(/<fn><arccot><\/arccot><\/fn>/gi,"<arccot/>");
	codeStr=codeStr.replace(/<mml:fn><mml:arccot\/><\/mml:fn>/gi,"<mml:arccot/>");
	codeStr=codeStr.replace(/<fn><arcsec><\/arcsec><\/fn>/gi,"<arcsec/>");
	codeStr=codeStr.replace(/<mml:fn><mml:arcsec\/><\/mml:fn>/gi,"<mml:arcsec/>");
	codeStr=codeStr.replace(/<fn><arccsc><\/arccsc><\/fn>/gi,"<arccsc/>");
	codeStr=codeStr.replace(/<mml:fn><mml:arccsc\/><\/mml:fn>/gi,"<mml:arccsc/>");
	return codeStr;
}
function addprefixP(con) 
{
  	var result=convertToPresentDOM(con);
  	if(getOs()==1)
    {
     var STR = GetMathMLExP(result);
    }else
    {
  	 var STR = GetMathMLExP(result,"mml");
    }
	  currentmath1=STR;
	  currentmath1='<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">'+currentmath1.substr(10,currentmath1.length-9);
    return currentmath1;
}
function replaceStr(str,oldStr,newStr,h)
{
	var tmpStr;
	var pos1;
	pos1=str.indexOf('<mml:mstyle mathbackground="#00ff00" tempinput="1">');
  pos2=pos1+oldStr.length+h+13;
	if(pos1<0){
		tmpStr=str;
		return tmpStr;
	}
		tmpStr=str.substring(0,pos1);
		tmpStr += newStr;
		str = str.substring(pos2-1,str.length);
    tmpStr += str;
	  return tmpStr;
}


function val_currentmath(str)
{ 
  currentmath=str;
}

function getOs() 
{ 
   var OsObject = ""; 
   if(navigator.userAgent.indexOf("MSIE")>0) { 
   return 1; 
   } 
   if(isFirefox=navigator.userAgent.indexOf("Firefox")>0){ 
   return 2; 
   } 
   if(isSafari=navigator.userAgent.indexOf("Safari")>0) { 
   return 3; 
   } 
   if(isCamino=navigator.userAgent.indexOf("Camino")>0){ 
   return 4; 
   } 
   if(isMozilla=navigator.userAgent.indexOf("Gecko/")>0){ 
   return 5; 
   } 
   return 0;
} 

function getMathmlCode(Expr,ns)
{
	var MathMLValue="";
	if (Expr.nodeType == 3) {
		var nv=Expr.nodeValue;
		var nv1=nv.charCodeAt();  
		var nv2="";
    switch(nv1)
    {
    	case 9633: nv2="&#x25A1;"; break;
    	case 8734: nv2="";break;
    	default: nv2=nv; break;
    }
		MathMLValue =  MathMLValue + " "+nv2+" ";
		return MathMLValue;
	}
	if (Expr.childNodes.length == 0) {
		MathMLValue = MathMLValue + "<"+Expr.nodeName+getAtt(Expr)+"/>";
		return MathMLValue;
	}
	else {
		MathMLValue = MathMLValue + "<"+Expr.nodeName+getAtt(Expr)+">";
		for (var i=0; i<Expr.childNodes.length; i++) {
			MathMLValue += getMathmlCode(Expr.childNodes[i]);
		}
		MathMLValue = MathMLValue + "</"+Expr.nodeName+">";
	}
	return MathMLValue;
}

function getAtt(node)
{
	var list = " ";
	for (var i=0; i<node.attributes.length; i++) {
			list = list+ node.attributes[i].nodeName + '="' + node.attributes[i].nodeValue + '" ';
	}
	return list;
}

